Valve for internal-combustion engines.



G. E. FRAZER.

VALVE FOR INTERNAL COMBUSTION ENGINE-S.

Patented July 6, 1915.

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VALVE FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED DEC.22. 1913.

11455008.. Patented Jul 1915.

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. VALVE Eon. INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent. I

Application flied December 22, 1913. Serial No. 808,107.

To allwhom it ma concern:

Be it known t at I, GEORGE E. FRAZER, citizen of the United States, residing at Flint, county of Genesee,' State of Michigan, have invented a certain new and useful Improvement in Valves for Internal- Combustion Engines, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being h3.d'

to the accompanying drawings, which form apart of this speci cation.

My invention relates to an improvement in valves for internal combustion engines shown in the accompanying drawings, and more particularly pointed out in the following specification and claims.

It ig well known that the usual puppet or mushroom valveemployed in internal combustion engines requires frequent grinding to insure proper seating of the valve; that it is noisy in its operation and that it is diflicult to keep clean-and free from the formation of carbon. It is also well known that slide valves as ordinarily constructed for use in steam engines are not, adapted for gas-engine construction,--it being necessary in the latter construction to particularly insure against leakage past the valve in order to hold the compression in the cylinder. I

The object of thepresentinvention is to overcome the foregoing and other well known. objections to the puppet type of valve in common use, by the employment of a valve of the slidin type, with means adapted to automatical y take up any wear between the valve and its co-actingparts through use, thereby insuring against loss of compression,the novel construction particularly adapting it for use on internal combustion engines.

Other advantages and improvements will hereafter appear.

In the drawings accompanying this specification :Fi re 1 is a cross sectional view through the what valve and a fragmentary portion of the cylinder of an mternai combustion engine, indicating diagrammatlcally the cam shaft for operating thewalve. Fig. 2 is a fragmentary sectional vlew throu the valve chamber of the cylinder at rig t angles to Fig. 1, indicating in elevation the slide valve housedwithin. Fig. 3 is a. horizontal sectional view through the valve chamber and a fragmentary portion of the cylinder. Fig. 4 is a cross sectional view of a modification, indicatin a fragmentary portion of a cylinder, and dia ammatically the cam for operating the va ve. Fig. 5 is a fragmentary sectional view throughthe cylinder indicating in elevation a modifica- 7 tion of the plate in contact with the face of thevalve. -Fig. 6 is an edge view with parts broken away and in section of "the plate shown in the preceding figure.

/ Referring now to the letters of reference placed upon the drawings: A denotes the cylinder of an internal combustion engine.

B, the water jacket. C the inlet and the exhaust ports.

E indicates the inlet valve provided with a port e, and F, the exhaust valve having a like port f.'the inlet and exhaust valves being identical in construction and operation a description of one will include the other. The valve E is provided with a stem Patented July 6,1915.

E projecting through the lower wall of the valve chamber where it is fitted with a spring E one end of which bears against the end of the valve chamber and the other against an adjustable nut e for regulating- H denotes a shaft carrying a cam H,

adapted to actuate the swinging arm I, by means of which the valve stem E carrying the valve E, is raisedf J, J, are adjustable strips or liners housed within the valve chamber or page which respectively bear against the edges of the valve on each side.

K, are springs which may be of helical or other form adapted to force the strips J, J, into impinging contact with the sides of the valve.

L, is a plate having an opening L registering with the inlet port of the cylinder and provided with an inwardly projecting flange Z surrounding the opening extending into a recess in the wall of the cylinder for its reception ;the object of the flange being to serve as a baffle against loss of oompression in the cylinder between the plate and its wall. 7

M, M, are springs-which may also be helical or of other formadapted to force the plate L against the face of the valve E. N, is aremovable cover plate secured to the wall of the cylinder by removing which the valve E maybe withdrawn or replaced.

.-While the valve E in the embodiment shown is adapted to slide directly between the walls of the cylinder, or the cylinder and manifold, it may if desired be housed within a removable cage, the latter being adapted for installation between the walls of the cylinder and manifold.

In the modification shown in Figs. 4, 5, and 6 the movable plate L is of circular form having a recess around its periphery eration of my valve will be readily understood. The inlet and exhaust valves in the present embodiment are actuated through the operation of suitable cam shafts, the exhaustvalve being so timed that the latter will close when the inlet valve is opened todeliver gas to the cylinder, and upon firing the charge both valves will be closed,--fol'- lowed immediately by the opening of the exhaust valve to'release the burned gasesafter which the exhaust valve will close and the cycle of operation be repeated. It will now be apparent that the adjustable strips J, J, and the plate L, will be automatically and respectively forced into intimate contact with the sides and face of the valve E,

through the action of the several springs bearing thereon, and that loss of compression within the cylinder will be thereby eliminated,while the sliding action ofthe valve will serve to keep it bright and-clean and free from the deposit of carbon. Provision having been made against loss of compression around the valve,which has a sliding rather than a lifting movement,- it will be apparent to those skilled in the art that the action of the valve will be practically'noiseless and without loss of power.

Having thus described my invention, what I claim is 1. In an internal combustion engine, a valve having an opening therein, a plate having an opening therein slidably engaging said valve upon movement of the plate, and upon movement of thevalve, a flange formed upon the plate and engaging the engine for guiding said plate in its move ment to and from the valve and preventing lateral movement of the plate during such movement, and springs disposed upon opposite sides ofthe flange for exerting an even pressure upon said plate.

wall of the cylinder and controlling 2. In an internal combustion engine having a gas port and a recess surrounding the gas port, a valve controlling the recess, a flange formed upon the plate and surrounding the recess, said flange being considerable less in width than the width of the plate and slightly less in length than saidfl plate, and

springs disposed upon opposite sides of the flange for exerting an even pressure of the plate against said-valve, and means engaging the periphery of the plate for sealing the latter. j

3. In an internal combustionengine having a gas port of elongated formation and a recess surrounding said gas port, a valve controlling said gas port, a plate engaging said valve and disposed between the latter and the gas port, said plate having an elon gated opening formed therein corresponding to the gas port, a flange surrounding the opening in said plate, said flange being. continuous and of substantially elliptical formation, said flange being slidable in the recess surrounding the gas port for holding the plate against lateral movement, means disposed upon opposite sides of the flange and spaced therefrom for exerting an even engaging the walls of the recess for preventing leakage.

5. In an internal combustion engine, a

slide valve movable to control the gas port of the engine, the cylinder of said engine having a recess formed therein and surrounding the gas port, a slidable plate disposed within the recess, means interposed between the plate, and adjacent portion of the cylinder of the engine for yieldingly forcing the plate into engagement with the valve, and means carried by the edges of the plate for engaging the walls of the recess, and sealing the same against leakage.

6. In an internal combustion engine having a gas port formed in one wall of the cylinder thereof, a valve slidable Within the the gas port, the cylinder of said engine aving a recess provided therein and surrounding the gas port, a plate disposed within the recess, means interposed between the plate and adjacent portion of the cylinder for yieldingly forcing the plate into engagement with the slide valve, and an outwardly yieldable split ring carried by said plate for engaging the inner wall of the recess and preventing leakage.

7. In an internal combustion engine having a gas port formed in one Wall of the cylinder thereof and an enlarged circular recess a slide valve, a circular plate movable in the recess to and from the slide valve, means interposed between the plate and the adjacent wall of the cylinder for yieldingly forcing the plate into engagement with the slide valve, said plate having a groove in its periphery, and an outwardly yieldable split ring disposed within the groove in said plate for engagement withthe inner wall of the recess.

In testimony whereof, I sign this specification in the presence of two witnesses.

GYLER E. MERRILL, IRVIN L. YOUNG. 

